How have outreach eye health services been delivered globally? Protocol for a scoping review.

Abstract

In all countries, some population groups experience barriers to accessing eye health services, contributing to health inequities. Outreach is a common strategy used to deliver healthcare services to populations experiencing inequities. This scoping review aims to summarise the nature and extent of the existing literature describing outreach as a service delivery model to improve access to eye health services, particularly among populations experiencing inequities. An information specialist will search academic databases (Medline, Embase and Global Health) without language restrictions to find peer-reviewed articles describing outreach eye health services, published in any country between 1 January 2010 and the search date. Grey literature sources will also be searched. In Covidence, two reviewers will independently screen titles and abstracts and subsequently relevant full texts against the inclusion criteria. Data extraction will also be performed independently by two reviewers in Covidence. This scoping review will summarise the characteristics of the included outreach eye health services, including the type of eye health service delivered, personnel involved, mode of transport, source of funding and whether the service targeted any specific PROGRESS-Plus group (Place of residence, Race/ethnicity/culture/language, Occupation, Gender/sex, Religion, Education, Socioeconomic status, Social capital, Plus). We will present our findings quantitatively using diagrams, tables and graphs. Ethics approval was not sought, as this scoping review will use only publicly available reports. The results of this review will be disseminated through publication in a peer-reviewed journal and will be presented at eye health conferences. It will offer valuable insights for eye health providers, health and social service providers and policymakers who are interested in improving access to eye health services for populations experiencing inequities. This scoping review will inform a project in New Zealand which aims to develop outreach eye health services to populations experiencing inequities, such as unhoused people and refugees. This protocol was registered on the Open Science Framework on 11 November 2025 (https://osf.io/vyz32).